:root{
  --bg:#04121f; --bg2:#062033; --ink:#eaf4ff; --mut:#9db8d0; --line:rgba(94,234,212,.16);
  --cy:#22d3ee; --bl:#3b82f6; --gr:#34d399; --am:#fbbf24;
  --grad:linear-gradient(100deg,#22d3ee 0%,#3b82f6 55%,#34d399 100%);
  --card:rgba(13,40,62,.66); --radius:14px; --radius-lg:20px; --radius-xl:28px;
  --ease:cubic-bezier(.22,1,.36,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","WenQuanYi Micro Hei",system-ui,-apple-system,sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.2;letter-spacing:-.02em;margin:0}
p{margin:0}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
/* 背景 */
.aurora{position:fixed;inset:0;z-index:-2;overflow:hidden;background:
  radial-gradient(1200px 600px at 80% -10%,rgba(59,130,246,.18),transparent 60%),
  radial-gradient(900px 500px at 0% 100%,rgba(34,211,238,.12),transparent 60%),
  linear-gradient(180deg,#04121f,#03101b 60%,#020c15);
  background-image:linear-gradient(rgba(94,234,212,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(94,234,212,.05) 1px,transparent 1px),radial-gradient(1200px 600px at 80% -10%,rgba(59,130,246,.18),transparent 60%),radial-gradient(900px 500px at 0% 100%,rgba(34,211,238,.12),transparent 60%);
  background-size:48px 48px,48px 48px,auto,auto;background-position:0 0}
.grid-lines{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background:linear-gradient(90deg,transparent 0 49.7%,rgba(94,234,212,.07) 49.7% 50.3%,transparent 50.3% 100%);background-size:120px 100%;mask-image:linear-gradient(180deg,#000,transparent 70%)}
/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(4,18,31,.78);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;gap:20px;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:.01em}
.logo-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;color:#04121f;background:var(--grad);box-shadow:0 0 18px rgba(34,211,238,.45)}
.logo-mark svg{stroke-width:2.6}
.menu{display:flex;gap:6px;margin-left:auto;align-items:center}
.menu>a{padding:8px 14px;border-radius:999px;font-size:14.5px;color:var(--mut);font-weight:500;transition:.25s}
.menu>a:hover{color:var(--ink);background:rgba(34,211,238,.08)}
.menu>a.on{color:#04121f;background:var(--grad);font-weight:700}
.nav-actions{display:flex;align-items:center;gap:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:999px;font-size:14.5px;font-weight:600;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:.25s}
.btn-primary{color:#03121f;background:var(--grad);box-shadow:0 8px 22px -8px rgba(34,211,238,.7)}
.btn-primary:hover{filter:brightness(1.12);transform:translateY(-1px)}
.btn-ghost{color:var(--ink);background:rgba(255,255,255,.04);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--cy);color:var(--cy)}
.btn-lg{padding:13px 26px;font-size:15px}
.btn-sm{padding:7px 15px;font-size:13px}
.nav-toggle{display:none;background:none;border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:8px;cursor:pointer}
/* 通用 */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--cy)}
.eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--cy);box-shadow:0 0 0 4px rgba(34,211,238,.18);animation:pulse 2s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 8px rgba(34,211,238,0)}}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-head.split{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;max-width:none}
.sec-head h2{font-size:clamp(26px,3.6vw,40px);margin:12px 0 14px}
.sec-head p{color:var(--mut);font-size:15.5px}
.canvas{padding:84px 0}
.canvas-2{padding:84px 0;background:linear-gradient(180deg,rgba(8,32,51,.6),rgba(4,18,31,0))}
.card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;overflow:hidden;transition:.3s var(--ease)}
.card-hover:hover{transform:translateY(-6px);border-color:rgba(34,211,238,.5);box-shadow:0 18px 40px -18px rgba(34,211,238,.5)}
.card-shine{position:absolute;inset:0;opacity:0;transition:.3s;background:radial-gradient(320px circle at var(--mx,50%) var(--my,0%),rgba(34,211,238,.14),transparent 65%)}
.card:hover .card-shine{opacity:1}
.ico{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;color:var(--cy);background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.22);margin-bottom:16px}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--mut);font-size:14.5px}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}
.tags span{font-size:12px;color:#a5f3fc;background:rgba(34,211,238,.08);border:1px solid rgba(34,211,238,.2);padding:3px 10px;border-radius:999px}
.chip{font-size:12px;font-weight:700;color:#04121f;background:var(--grad);padding:4px 12px;border-radius:999px}
.link{display:inline-flex;align-items:center;gap:6px;color:var(--cy);font-size:14px;font-weight:600}
.link svg{transition:.25s}.link:hover svg{transform:translateX(4px)}
.link-mini{display:inline-block;margin-top:14px;font-size:13px;color:var(--cy);font-weight:600}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.flex-between{display:flex;justify-content:space-between;align-items:center}
/* 页面头 */
.page-hero{padding:72px 0 52px;position:relative;overflow:hidden}
.page-hero-in{max-width:820px}
.page-hero h1{font-size:clamp(34px,5.4vw,58px);margin:16px 0 18px}
.page-hero p{color:var(--mut);font-size:16.5px}
/* 统计 */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center}
.stat b{display:block;font-size:clamp(32px,4.4vw,48px);font-weight:800}
.stat b sup{font-size:.5em;top:-.7em}
.stat span{color:var(--mut);font-size:14px}
/* 科技图 */
.tech-fig{margin:0;background:linear-gradient(160deg,rgba(13,44,68,.85),rgba(5,20,34,.9));border:1px solid var(--line);border-radius:var(--radius-xl);padding:18px;box-shadow:0 24px 50px -24px rgba(0,0,0,.8)}
.tech-fig svg{display:block;width:100%;height:auto}
.tech-fig figcaption{margin-top:10px;text-align:center;font-size:12.5px;color:var(--mut);letter-spacing:.04em}
.fig-cap{position:absolute;left:18px;bottom:14px;font-size:11.5px;color:var(--mut);letter-spacing:.1em}
.flow{stroke-dasharray:6 10;animation:flow 1.6s linear infinite}
@keyframes flow{to{stroke-dashoffset:-32}}
.blink{animation:bl 2.4s ease-in-out infinite}
.blink.b{animation-delay:.8s}.blink.c{animation-delay:1.6s}
@keyframes bl{0%,100%{opacity:.35}50%{opacity:1}}
@media(prefers-reduced-motion:reduce){.flow,.blink,.eyebrow i{animation:none}}
/* CTA */
.cta-wrap{padding:40px 0 90px}
.cta{position:relative;text-align:center;padding:54px 24px;border-radius:var(--radius-xl);background:linear-gradient(140deg,rgba(19,58,88,.9),rgba(6,26,42,.95));border:1px solid rgba(34,211,238,.28);overflow:hidden}
.cta-glow{position:absolute;width:460px;height:460px;border-radius:50%;background:radial-gradient(circle,rgba(34,211,238,.22),transparent 65%);top:-260px;left:50%;transform:translateX(-50%)}
.cta h2{font-size:clamp(24px,3.4vw,36px)}
.cta p{color:var(--mut);margin:12px 0 26px}
.cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
/* 页脚 + 网站地图 */
.foot{border-top:1px solid var(--line);background:rgba(3,14,24,.9);padding-top:56px}
.sitemap{padding-bottom:44px;border-bottom:1px solid rgba(148,163,184,.12)}
.sitemap-head{display:flex;align-items:baseline;gap:14px;margin-bottom:26px}
.sitemap-head h4{margin:0;font-size:16px;letter-spacing:.08em}
.sitemap-head span{font-size:12px;color:var(--mut);letter-spacing:.14em;text-transform:uppercase}
.sm-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:24px}
.sm-col h5{margin:0 0 12px;font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--cy)}
.sm-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.sm-col a{font-size:13.5px;color:var(--mut);display:inline-flex;align-items:center;gap:7px;transition:.2s}
.sm-col a:hover{color:var(--cy);transform:translateX(3px)}
.sm-col a::before{content:"";width:4px;height:4px;border-radius:50%;background:currentColor;opacity:.45;flex:none}
.sm-col small{color:#5f7d95;font-size:12px;display:block;margin-top:10px;line-height:1.6}
.foot-grid{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:28px;padding:44px 0}
.brand-line{color:var(--mut);font-size:13.5px;margin:14px 0 18px;max-width:320px}
.socials{display:flex;gap:10px}
.socials a{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;color:var(--mut);border:1px solid var(--line);transition:.25s}
.socials a:hover{color:var(--cy);border-color:var(--cy);transform:translateY(-2px)}
.foot h4{font-size:14px;margin-bottom:12px}
.foot ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.foot ul a,.foot ul li{font-size:13.5px;color:var(--mut)}
.foot ul a:hover{color:var(--cy)}
.foot-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:20px 0 32px;border-top:1px solid rgba(148,163,184,.12);font-size:12.5px;color:#7d97af}
.foot-bottom a:hover{color:var(--cy)}
@media(max-width:960px){
  .menu{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;background:rgba(4,18,31,.97);border-bottom:1px solid var(--line);padding:14px 24px}
  .menu.mobile-show{display:flex}
  .menu .mobile-only{display:none!important}
  .nav-toggle{display:block}
  .grid-3,.grid-4,.stats-grid,.sm-grid{grid-template-columns:repeat(2,1fr)}
  .grid-2{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .sec-head.split{flex-direction:column;align-items:flex-start;gap:16px}
}
@media(max-width:560px){.grid-3,.grid-4,.stats-grid,.sm-grid,.foot-grid{grid-template-columns:1fr}}